Multiple exposures give different view of Novak Djokovic's serve

Novak Djokovic of Serbia serves during the men's singles match against Janko Tipsarevic of Serbia during the Barclays ATP World Tour Finals at the O2 Arena on Nov. 25, in London, England.

As a tennis fan, I enjoyed getting to see Novak Djokovic's serve captured in this way. While the end of this match didn't go well for Djokovic, he's had an impressive year, taking the number one ranking from Rafael Nadal. ESPN reports:

A weary Djokovic finished his spectacular season by losing more matches in three days than he did in the first seven months of the year, earning the top-ranked Serb an early exit in the ATP World Tour Finals.

After winning three Grand Slam titles and seizing the No. 1 ranking from Rafael Nadal before having the last few months derailed by injuries, Djokovic had simply run out of energy coming into the season-ending tournament.